Hello everyone.
I recently needed to use Cesium’s math helpers in Observable and encountered the problem that this package is not published as an UMD package suitable for observable. So I quickly coded a re-packaging of Cesium which is here: cesium-umd - npm
Works as excepted if anyone needs to do the same thing than me. Tough it would be really nice if the official cesium npm package could contain the same UMD version.